1.someone who regularly e-mails someone else
1.One particular activity that takes advantage of these points is a keypal exchange.
笔友之间利用电子邮件进行交流活动正是基于电子邮件的这些特点。
2.If your daughter is interested in having a keypal next year, please have her get in touch.
你的女儿如果来年有意结交网友的话,请让她同我联系。